@article{Polulyakh_2013, title={Trees as Level Sets for Pseudoharmonic Functions in the Plane}, volume={65}, url={https://umj.imath.kiev.ua/index.php/umj/article/view/2483}, abstractNote={Let <em class="a-plus-plus">T</em> be a finite or infinite tree and let <em class="a-plus-plus">V</em> <sub class="a-plus-plus">0</sub> be the set of all vertices of <em class="a-plus-plus">T</em> of valency 1. We propose a sufficient condition for the image of the imbedding ψ: <em class="a-plus-plus">T</em> \<em class="a-plus-plus">V</em> <sub class="a-plus-plus">0</sub> → <span class="a-plus-plus inline-equation id-i-eq1"> <span class="a-plus-plus equation-source format-t-e-x">\( {\mathbb{R }^2} \)</span> </span&gt; to be a level set of a pseudoharmonic function.}, number={7}, journal={Ukrains’kyi Matematychnyi Zhurnal}, author={Polulyakh, E. O.}, year={2013}, month={Jul.}, pages={974–995} }